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Calculate the energy required to heat 179g of ethanol from to . Assume the specific heat capacity of ethanol under these conditions is . Be sure your answer has the correct number of significant digits.

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Answer:

9.52 × 10³ J

Explanation:

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Calculate the energy required to heat 179g of ethanol from -2.2 °C to 19.6 °C. Assume the specific heat capacity of ethanol under these conditions is 2.44 J/g.°C. Be sure your answer has the correct number of significant digits.

Step 1: Given data

  • Mass of ethanol (m): 179 g
  • Initial temperature: -2.2°C
  • Final temperature: 19.6 °C
  • Specific heat capacity of ethanol (c): 2.44 J/g.°C

Step 2: Calculate the temperature change

ΔT = 19.6 °C - (-2.2 °C) = 21.8 °C

Step 3: Calculate the energy required (Q)

We will use the following expression.

Q = c × m × ΔT

Q = 2.44 J/g.°C × 179 g × 21.8 °C

Q = 9.52 × 10³ J

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